After looking in to it myself, I was told the 50 series and the new hydraflex's are not a good match. Lots of money to get everything converted and after all the software updates there are no promises all the features of the header will function properly. I think it was like $5k for feederhouse mod's, software updates, wire harnesses and the lift cylinders are supposed to be bigger, but the 50 series can't be fitted with the right lift cylinders.